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Current Products

Which product is best for me?

5m (standalone) X X X
1-2m (DGPS) X X X
< 1m (SBAS) X X X
5cm (StarFire) X X X
1cm + 1PPM(RTK) X X X

Significant features per product

OEM Board X
Battery Operated X
Internal UHF Radio X
Pole Mount X
Up to 10Hz Output X
Up to 100Hz Output X X
IPPS Output X X
Event Input Trigger X X
USB Interface X X
Ethernet Interface X
RS-232 X-TTL X X
Internal 2GB User Memory X-SD Card X

Product line Benefits:

All products are based on the 66 channel Sapphire board offering multi frequency and multi constellation GNSS coverage. NavCom's RTK algorithm provides fast initialization, and the NCT ultra-compact binary data format for RTK ensures robust data throughput on the built-in s radio (SF-3040) or third party radio solution.

The NavCom product line provides decimeter accuracies positioning anywhere in the world, anytime. With these all-in-one StarFire™ sensors, you don't need a base station to achieve 5cm accuracy. Plus, onboard memory and a geodetic-quality antenna enable millimeter-level accuracy from post-processing.

The NavCom product line also offers optional RTK and a NavCom unique feature, RTK Extend™ that uses StarFire to continue to provide RTK accurate position for up to 15 minutes when communication with the base station is lost.

What tools are available for receiver configuration?

StarUtil 3000 - engineering and service utility to configure, monitor and troubleshoot receiver performance.

How do I convert raw measurement data for post processing?

The StarUtil 3000 program embeds a RINEX conversion utility to convert NCT (NavCom Technology) binary raw data (MEAS1B, PVT1B, and EPHEM1B messages) to RINEX v2.1 format. Converting NCT raw data to RINEX provides a means to post-process the raw data where third party software packages do not support the NCT Binary format, but do possess the ability to import RINEX Standard measurement data.

For more information, please refer to the StarUtil 3000 User Manual.

What about broadcasting requirements and licensing compliance?

The user must ensure adherence to all local and national regulations and licensing requirements pertaining to radio transmit frequencies and power output levels prior to commencing transmission.

What frequency range do the radio modems cover?

400 MHz Radio in the SF-3040

The operating frequency of the radio is user programmable from 403.000 to 473.000 MHz in 0.025 or 0.0125 MHz steps. The factory setting allows the user to modify the power level between 10 mw and 1 watt.

In most cases, the user must obtain a license to operate the radio in a specified location, frequency and power level. The user must ensure adherence to all local and national regulations and licensing requirements pertaining to transmit frequencies and power output levels prior to commencing transmission.

What conditions are required to achieve advertised accuracies?

Specifications are based on the following: PDOP <4, 1-sigma (65%), 24-hour averaged set of data. Further, performance is dependent upon, but not limited to location, satellite geometry, atmospheric conditions (i.e., solar storm activity), local interference, DoD signal degradation (i.e., Selective Availability or similar techniques), satellite messaging or timing errors, and augmentation correction messages. Equipment operated on a single-frequency (i.e., L1/G1) is more susceptible to atmospheric and solar storm activity than multi-frequency operated equipment.

Local conditions may have an impact on accuracy. Interference, such as harmonics from collocated transmitting antennas, and multipath, induced by reflective surfaces in the proximity of the antenna, can be harmful to the quality of the measurements used within navigation. Local obstructions, such as bridges and large structures, can also inhibit performance as they impact the receiver’s ability to track signals in the direction being blocked.

Ionosphere is another concern. The single frequency operation relies on two ionospheric models to navigate with StarFire precision; the Klobuchar Model – which is broadcast by the GPS satellites, and the WAAS Model – which is broadcast within the SBAS corrections. The latter model provides the greatest accuracy (~50cm horizontal), but only within the SBAS operational areas. The Klobuchar Model is less resolute, so the navigation accuracy is less accurate, (~80cm horizontal), but can be used worldwide.

WAAS Ionosphere correction availability is contingent upon the ability of the receiver to decode the WAAS correction stream and compute a valid Ionosphere correction for each satellite used in Navigation. Should the receiver be tracking WAAS but operating out of the WAAS Ionospheric coverage area, the Klobuchar model is used.

What RTCM message types are supported?

Sapphire based products are capable of receiving and using the following RTCM message types: 3, 18-22, 1001-1012, 1019-1020, and 1033.

Does NavCom's airborne antenna meet the EASA/ETSO standard?

The basic environmental and electrical testing called out by RTCA DO 160 and RTCA DO 228 are the same for TSO-C144 and ETSO-C144.

When documents are submitted for EASA ETSO by NavCom's supplier, they use the same qualification test reports that are submitted to FAA ACO to get TSO approval. That is in addition of filing a few other EASA required general forms. These additional forms are a formality and do not add additional testing. Though this paperwork has not been officially filed within Europe, the antenna does conform to the European standards by associated testing conducted against the FAA requirement.

Why is position based on the antenna location and not the receiver baseband?

The cable delays, internal filtering delays and the delays due to clocking of samples inside the ASIC and the difference between GPS time and UTC are common to all of the GPS satellites. This common term appears as a receiver clock error in the Kalman filter solution. The receiver steers the timing of the UTC pulse-per-second output pulse and the timing of the periodic position solutions to offset the delays. The position solution should give the time the signals reach the satellite antenna and the altitude should be the altitude of the antenna.

How do I calibrate the 1PPS?

To create a super accurate timing of the 1PPS, lengths of the 1PPS cables, delays in 1PPS output buffers, etc. must be compensated. There is a control in the 1PPS control software (0x16 in the SF-2050 and [1PPS] in the SF-3050) that allows the operator to slew the 1PPS and measurement timing so that the 1PPS at the end of its cable is precisely synched.

How is the antenna offset established?

The Slant range (or Height when a tripod is not in use; input message x4B, W3 – range: -32768 – 32767mm for the SF-2050 and [ANTENNAHEIGHT] in the SF-3050) of a 10-foot offset to the ARP (antenna reference point, which is usually the base of the antenna) of our antenna would be 3048mm. Post-processing software will also need to know the phase center offset for this antenna, which is calibrated and published on the NGS website. The SF-2050M Airborne receiver antenna is defined here. Our altitude or height calculation is the slant range above the surface of interest to the ARP + the antenna phase center offset. When used in an RTK system, the Base and Rover need to use the NGS antenna offset calculation in order to achieve the most accurate results. As an alternative, the L1 or L2 (choose one or the other across all platforms) phase center offset printed on the antenna bottom label (with proper orientation to ARP) may be applied for relative antenna position accuracy.

Which USB flash drive performs best with the SF-3050?

The SanDisk Cruzer Titanium Plus 4GB USB drive provides excellent data retention.

Where may I find the lower frequency band antenna for the SATEL 35W UHF radio?

SATELLINE EPIC PRO 35W is specified to operate within frequency range of 400 – 770 MHz (4 MHz Field Selectable).


The available antenna on the price list supports the frequency range of 450 – 470 MHz. If for some reason the users wish to operate at a lower frequency range (e.g. 406 – 430 MHz) then the appropriate antenna can be ordered directly from the manufacturer. The product and manufacturer/distributor information are as follows:

Manufacturer: Laird

Distributor: Arcadian; Part Number: CW4065C

What can I try if I am having Nautiz X8 and MicroSurvey Field Genius Performance Issues?


My screen is not refreshing, how do I recover from this? This is caused by a random memory allocation problem. To recover from this, you must perform a Hard Reset by power cycling the Handheld and rerun FieldGenius software. Note: No Project data will be corrupted if this problem occurs, the worst case may require restoring the last surveyed point.

Software locked up or is unresponsive, how do I recover from this? To recover from this, you must perform a Hard Reset by power cycling the Handheld and rerun FieldGenius software. Note: No Project data will be corrupted if this problem occurs, the worst case may require restoring the last surveyed point.

What version of Handheld OS (Operating System) and FieldGenius should I be running for optimum performance? Handheld OS v78.06 or newer and FieldGenius v8.2 or newer.